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7 <br /> r1 <br /> r� <br /> , <br /> ra Appllerl GwSystems 4191-E Power Inn Road, Sacramento,CA 95826 (916)452-2901 <br /> e FREMONT Y IRVINE a HOUSTON o BOSTON a SACRAMENTO •CULVER CITY •SAN JOSE <br /> /1 <br /> January 22, 1990 <br /> 1122gd em <br /> AGS 86102-4 <br /> 04 <br /> Mr. Glenn Dembroff <br /> Ultramar Inc. <br /> 525 West Third Street <br /> Hanford, California 93230 <br /> Subject: Letter Report cn quarterly groundwater monitoring,fourth quarter 1989, at <br /> Beacon Station No. 492, 470 North Main Street, Manteca, California. <br /> Mr. Dembroff: <br /> ® At the request of Ultramar, we are presenting this letter report summarizing the methods <br /> J and results of the quarterly groundwater monitoring performed by Applied GeoSystems at <br /> the subject site. The site is at the southeast corner of North Main and Alameda Streets, <br /> as shown on:the Site Vicinity Map (Plate P-1). The locations of the grourld-water <br /> monitoring wells relative to site,facilities are depicted on the Generalized Site Plan (Plate <br /> P-2). Previous work at the site by Applied GeoSystems is documented in the reports cited <br /> =® in the attached references list. <br /> A geolGgist irom Applied GeoSystems visited the site on December 13, 1989, io collect <br /> groundwater samples from the three monitoring wells for laboratory analysis.-The depth <br /> to ground eater surface r/as measured, and water from each monitoring well was analyzed <br /> .� subjectively using methods outlined in the attached Field Procedures. The geologist noted <br /> no subjective evidence of hydrocarbon product. Results of these and previous subjective <br /> analyses are summarized in Table 1. <br /> Ground water from each monitoring well was purged and sample.as outlined in the Field <br /> Procedures: The field geologist initiated a Chain of Custody Record that accompanied the <br /> ® samples to the analytical laboratory. A copy of that record is aitached. The purge water <br /> from the wells was stored temporarily onsite in properly labeled,55-gallon,.17-E steel drums <br /> approved for that use by the Department of Transportation,pending removal by Ultramar. <br /> � V <br />